plz Prove the above Q
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sec○=1/cos
sec4 ○= 1/cos4○
1/sec 4○ - 2 of cos 4○ (that is sec)
= (1 - 2 )cos 2○
sec4 ○= 1/cos4○
1/sec 4○ - 2 of cos 4○ (that is sec)
= (1 - 2 )cos 2○
Answered by
1
it's quite similar.i think this can help you.
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plz mark me brainliest
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