Question

what is the value of (cos2 67-Sin2 23

Answer 1

HEY HERE'S YOUR ANSWER ⬇️⬇️⬇️⬇️⬇️⬇️
By complementary angles rule of T ratio….

Cos² 67° = sin² ( 90° - 67°) = sin² 23°

So, cos² 67° - sin² 23°

= sin² 23° - sin² 23°

= 0

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Answer 2

Hello

Your answer is

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SOLUTION–
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cos²67 – sin²23

as we know that

cos( 90 –θ) = sinθ

Now,

cos²67 – sin²23
—› cos²( 90 – 23 ) – sin²23
—› sin²23 – sin²23
—› 0

So, The value of cos²67 – sin²23 is 0

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