Question

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CLASS - X
MATHS(TRIGONOMETRY)

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What is the value of cos² 17° - sin² 73° ?




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Answer 1

Answer:

0

Step-by-step explanation:

we have cos^2 17 - sin^2 73

cos^2 17 can be written as

cos^2(90-73)= sin^73

thus using that in our equation we get

sin^2 17- sin^2 73=0

Answered by gauthmath

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Answer 2

Answer:

0

Step-by-step explanation:

cos^2 17 - sin^2 73

= sin^2 (90 - 73) - sin^ 2 73

= sin^2 73 - sin^2 73

= 0