Question

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Trigonometry chapter
class 10 ​

Answer 1

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Answer 2

ANSWER:-

$\longrightarrow$$\sf\red{ {sec}^{2} 42° -{cosec}^{2} 48° }$

$\longrightarrow$$\sf\red{{sec}^{2} 42° = {cosec}^{2} (90° - 42°)}$

$\longrightarrow$$\sf\red{ {sec}^{2} - 42° = {sec}^{2} - 42°}$

$\longrightarrow$$\sf\red{0}$