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Evaluate sin square 63 + sin square 27 | Evaluate sin 25 degree cos 65 degree [Q3 both parts]
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Exercise 8.4 question 3 class 10
Both parts solved [Important Question]
Evaluate:
1. (〖sin〗^(2 ) 63° +〖sin 〗^(2 ) 27° )/(〖cos〗^2 17°+ 〖cos〗^(2 ) 73°)
or
sin square 63 degree + sin square 27 degree by cos square 17 + cos square 73 [0:12]
2. sin 25°cos65 °+cos 25°sin 65°
or
sin 25 degree cos 65 degree + cos 25 degree sin 65 degree [3:55]
Hint 💡
Trigonometric identity:
cos^2 A + sin^2 A = 1
Complementary angles:
sin (90° - A ) = cos A
cos (90° - A) = sin A
Note📝
The above question is taken from NCERT book ch-8 exercise 8.4 question 3 Trigonometry.
Read it 📖
Identity:
An equation is called an identity when it is true for all values of the variables involved.
Trigonometric identity :
Similarly, an equation involving trigonometric ratios of an angle is called a trigonometric identity, if it is true for all values of the angle(s) involved.
Practice👩🏫:
Write all the other trigonometric ratios of angle A in terms of sec A.
Trigonometric identities
Trigonometry playlist [latest]
Revise✍🏻:
Quadratic Equations
Polynomials
Real Numbers
Connect with us 🤩:
#ncert #class10maths #trigonometry
Both parts solved [Important Question]
Evaluate:
1. (〖sin〗^(2 ) 63° +〖sin 〗^(2 ) 27° )/(〖cos〗^2 17°+ 〖cos〗^(2 ) 73°)
or
sin square 63 degree + sin square 27 degree by cos square 17 + cos square 73 [0:12]
2. sin 25°cos65 °+cos 25°sin 65°
or
sin 25 degree cos 65 degree + cos 25 degree sin 65 degree [3:55]
Hint 💡
Trigonometric identity:
cos^2 A + sin^2 A = 1
Complementary angles:
sin (90° - A ) = cos A
cos (90° - A) = sin A
Note📝
The above question is taken from NCERT book ch-8 exercise 8.4 question 3 Trigonometry.
Read it 📖
Identity:
An equation is called an identity when it is true for all values of the variables involved.
Trigonometric identity :
Similarly, an equation involving trigonometric ratios of an angle is called a trigonometric identity, if it is true for all values of the angle(s) involved.
Practice👩🏫:
Write all the other trigonometric ratios of angle A in terms of sec A.
Trigonometric identities
Trigonometry playlist [latest]
Revise✍🏻:
Quadratic Equations
Polynomials
Real Numbers
Connect with us 🤩:
#ncert #class10maths #trigonometry
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Evaluate sin square 63 + sin square 27 | Evaluate sin 25 degree cos 65 degree [Q3 both parts]
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