Question

22. यदि cos (40° + :) = sin 30°, तो x का मान ज्ञात कीजिए।​

Answer 1

Answer:

the value of X from cos (40°+ x) will be 20°

cos (40°+x) = sin30° = 1/2

therefore, cos(40°+x) = cos60°

therefore, (40°+x) = 60°

then, x= 20°

Answer 2

Answer:

x = 20 °

Step-by-step explanation:

cos ( 40 ° + x ) = sin 30 °

cos ( 40 ° + x ) = 1/2

cos ( 40 ° + x ) = cos 60 °

40 ° + x = 60 °

x = 20 °

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